Anchor for safety harness



Oct. 28. 1 924.

A. E. MlLLlES ANCHOR FOR SAFETY HARNESS Filed May 5, 1921 FIG. 4

FIG. 2.

INVENTOR. I, 2%W024 ATTORNEY).

Patented Get. 28, 192 1,

STATES ARTHUR E. MILLIES, or i rirrwnuxnn, WISCONSIN.

AncHon ron SAFETY HARNESS.

Application filed May 3, 1921. Serial No. 168,5681. I

To all whom it may concern:

Be it known that I, ARTHUR E. MILLIns, a citizen of the United States, residing at Milwaukee, county of Milwaukee, and State of lVisconsin, have invented new and useful Improvements in Anchors for Safety Harness, of which the following is a specification.

This invention relates to improvements in anchors for the safety harness of window cleaners.

It is the object of this invention to provide an anchor which may be securely embedded in a wooden structure either at the time the structure is being erected or after it is complete without marring the surfaces of the woodwork.

It is a further object of this invention to provide an anchor which may be embedded in the window frame of any structure and which when so embedded may be secured beyond the possibility of accidental removal. More specifically, it is the object of this invention to provide an anchor having an angularly disposed tang adapted to be driven with a close fit into a hole which may be bored to receive it in any wooden structure and which will cooperate eWlth other securing means and with a base plate to make any accidental movement or removal of the anchor impossible.

A further object of this invention is to provide an anchor with a safety retaining device capable of holding the anchor in place, even tho the screw which normally secures the anchor to the building has been removed.

In the drawings Figure 1 is a fragmental elevation of a window casing of which a portion is broken away to expose an anchor embodying this invention. V

Figure 2 is a perspective view of the anchor on a larger scale, showing it pro, vided with the special retaining device with which it may be equipped if desired.

Figure 3 is a detail view of the end of the tang, the tangbeing cut away upon a section exposing the securing device hereinafter to be described. 7

Figure 4, is a detail view showing an anchor having a modified form of retaining device applied to a wooden structure.

Like parts are identified by the same reference characters throuout the several views.

It Will be understood thata device embodying this invention is particularly adapted to be secured to a wooden structure, and may be used in any part of a wooden struoture toperform any function for which it is suited. Anchors used for thispurpose, however, are ordinarily associated with a window frame so that when the window cleaner stands upon the sill to wash the outsideof the window, he may fasten his safety harness to one anchor upon each side of the frame. p

' In Figure l is shown at 10, a portion of the window frame, the upper sash being illustrated at 11 and the lower sash, at 12. lhe body of the anchor isymade in the form of a plate 14: which has a plane surface adapted to contact with the window frame. The outer surface 15 maybe rounded or beveled at the corners if desired to improve the appearance of the device. Mounted upon the'surface 15 and preferably'ma de integral with the plate 14 is .a T-shaped block 16 over which a fastening device can ried by the safety harness of the window cleaner is adapted to be secured in the usual manner. An opening 17 in plate 1 1 is adapt- 1 ed to receive a screw 18 which maybe turned into thewindow frame with which the device is associated. At the back of plate 14 is the tang 20 which projects downwardly therefrom at an angle.- TangQOis to be driven to an exceedingly close fit in the hole prepared to receive it. This tang is also preferably made integral with the base plate The point at which the .tang is attached to the plate ispreferably adjacent to the,

base of the T-shaped block 16, therebyi'caus ,ing the centers of turning moments in all if planes to coincide substantially at this point. In this way thevarious elements of the anchor are enabled to co-operate with each other 'to the fullest possible degree inv resisting any force tending to displace the anchor. Whether the strain is upward downward, or sideward, the tang will immediately tend to cramp in the-hole into which it is driven and the plane portion of the plate 14 will press with added force aga nst the wooden surfaceuupon which it bears.

Screw 18 in addition to its obvious function of securing the tang against withdrawal alsoserves to maintainthe plate 14 closely pressed against the wooden surface to prevent anypossible destructive play or movement-- of the anchor, which might result in loosening the tang in the recess made to receive. it. It will be noted that the tang 20 has a diameter of less length than the width of block 14 so that the rear or plane surface of said block forms a shoulder upon each side of tang 20 thereby providing a bearing surface adapted to aid in taking up side strains upon the anchor. reason of the factthat the 'tangQO is set at a decided downward angle" t'l1 e greatest strains upon the a t e"? he he v r ic Pl n or this "tha ch, he heari g bl k t is t itlesii hhre l jd new h s to give iBIl d bearing surfaces upon the window lfthi rle l c hi hfr tethe des i d wi be tei hti amp y s cure for Q d i ry r but where additional safety is necessary the sp siei re a ing de ic ho n n gu Zehd ay he in trp 'ret d- The me 20 'pifepared to receive this retaining device by h rin t ansvers hole 6 and Constructing t er sse's Ta ach sid Otthe me 11- L 111 ante th rtWithJ A piec fsp g i S'hth i t th har i a e e U comprises the safety device adapted to be d ihteftht hol 6 n recesses It d the tips of the wire may be bent ls y itv'e lly 3 at 9 to'tecil their entry intothe wood if the withdrawal of the eiithh sa temptejtln h t .drstq d ha Wh le. he ens driven. in o thsweod the spr n vi 1 wi he er l i i i Q h if tesse but ees is with awn ain the WOQdth bent ends g'of'the wire 8 will be urged by the fie n 1 he Wi hht hr h mov f the his te' t a e deeper d, deep iiitcth WQOd, Expei h hts ha e demontat ",d even without the screw 18 in i,-- an auth r qui ped wi h he saf ty wire 8 can with difficulty be extracted with hf r- There eir an a her made in q dahhe wit this, inv nt o w uld rei heret ve t9 h re t i sp te @t a v ile i hrimihe a tem to ta pe Th itty de e e it he anthe iittSti t t0 he elem n W911 a t9. iheiieie is iitli d i ie- "fi hs? mo ified for efa h Sho n i etth a s pl te the bl k .6, is, no new writ pe 0 h aeehqif alre dy d sc d ex ep a h lane is P ovided mer s e n ith a @192 thi nermel t0 h inner P n ei 'tat et the a e plate t b n h hole da ted t e ei ta s 2 it i s 0 Qt e well know cl vit y b d t f the bit. If a'jig is used, it may also Pi y ds means for i d a iie' h Po iti and $9 ,9 o the hole 2 which is r to, 1 s1 er wit h hol 2 in me and t fveth Pin 2%.- Th s P n 24 is driven into place aftertlie anchor has been positioned as shown and interlocks with the tang 20 to prevent absolutely the withdrawal of the anchor. If desired, the pin 24: may be driven out of sight into the member and the opening through which it entered may he puttied up to conceal the existence of the pin. The use of pin 24 or of the spring wire device hitherto described is optional, as for all ordinary purposes the anchor is unusually secure even without these additional interlocking devices;

The operation and use of the anchor has been described incidental to the foregoing discussion of its mechanical characteristics, t t bri f summary h f s will b ve By means ofajig. or other suitable device, the hole 22 is bored into the window casing at the proper angle to receive the tang 20. The hole ispreferably made to receive the tang with a driving fit so that when'the tang is driven into the hole, it will be rigidly anchored therein; The anchor is now driven home tothe position in which it is shown'in Figures 1 and 4: with the tang seated deep in "the frame of the window and the plate 14. flush with the exterior surface the frame. The screw 18 may then be turned up through hole 17 into the wood of frame memberlO and if the device shown in Figure 4 is being used, the pin 24 may be inserted to interloclrwiththe inner end or tang 20. It will be obvious that with the device so secured to the frame member 10, movement in any direction is impossible. Tang will cooperate with the broad, flat surface of plate l i and With the retaining screw 18 to resist movement in any direction whatsoever. The fact thatthe'tangQO and the screw 18 enter the frame member at an angle to each other provides ampiesecurity against the accidental withdrawal of the anchor. For special cases where additionalsecurity'is desired, the spring wire 8 or pin 24 maybe used. 'Either of these/devices will serve to retain the anchor in'place tho the screw 18 be removed, and either will prove inaccessible. I claim v Th te h hat il th Window tra n provided with an inclined recess, of a tang disposed in sa d recess, an aperturedplate a ach d h r an a Screw Patties ward the outer end of saidtang, a plate in-.

tegral with said tang and apertured at a point remote therefrom, and a screw passing through said aperture and into said frame aperture in said plate havingits axis on a on an axial line angularly deviating from line angular-1y deviated from the axis of 10 the axis of the tang. the tang, whereby a screw may be passed 3. An anchor for safety harnesses adapted through said aperture and, into said Window 7 to be secured to a Window casing having an frame at an angle angularly deviated from inclined recess, said anchor including a tang the tang. adapted to be inserted in said recess and an r r apertured plate attached to said tang, the ARTHUR E. MILLIES. 

